Question

Question 32:
The velocity-time graph for part of a train journey is a horizontal straight line. What does this tell you about
(a) the train’s velocity, and (b) about its acceleration ?

Lakhmir Singh Physics Class 9

Answer 1

Constant velocity and no acceleration .

Answer 2

In the velocity-time graph,the x-co-ordinate will indicate the magnitude of time,while the y-co-ordinate will tell us the magnitude of velocity of the train.Since,a horizontal straight line is denoted in the graph,it implies that velocity remains constant with respect to time and thus acceleration which is mathematically denoted as the rate of change of velocity,its acceleration will be zero.I hope this is helpful.